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Nature of Operations and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of Computation of Basic and Diluted Earnings Per Share | The following table shows computation of basic and diluted earnings per share.
| Years Ended December 31
| 2020 |  | 2019 |  | 2018
Basic earnings per share |  |  |  |  |
Net income | $ | 68,499 |  |  | $ | 66,538 |  |  | $ | 53,117 |
Weighted average common shares outstanding(1) | 44,044,737 |  |  | 43,493,316 |  |  | 38,347,059 |
Basic earnings per share | $ | 1.56 |  |  | $ | 1.53 |  |  | $ | 1.39 |
Diluted earnings per share |  |  |  |  |
Net income available to common shareholders | $ | 68,499 |  |  | $ | 66,538 |  |  | $ | 53,117 |
Weighted average common shares outstanding(1) | 44,044,737 |  |  | 43,493,316 |  |  | 38,347,059 |
Effect of dilutive securities: |  |  |  |  |
Restricted stock | 41,817 |  |  | 23,006 |  |  | 36,185 |
Stock options | 36,522 |  |  | 81,273 |  |  | 111,987 |
Weighted average common shares outstanding | 44,123,076 |  |  | 43,597,595 |  |  | 38,495,231 |
Diluted earnings per share | $ | 1.55 |  |  | $ | 1.53 |  |  | $ | 1.38 |
(1)Adjusted for 3:2 stock split on June 15, 2018
Schedule of Impact of ASC 326 | The following table illustrates the impact of ASC 326.
| January 1, 2020
| As Reported Under ASC 326 |  | Pre–ASC 326 Adoption |  | Impact of ASC 326 Adoption
Loans |  |  |  |  |
Commercial | $ | 25,614 |  |  | $ | 11,996 |  |  | $ | 13,618 |
Real estate | 4,971 |  |  | 923 |  |  | 4,048 |
Mortgage warehouse | 1,077 |  |  | 1,077 |  |  | — |
Consumer | 8,582 |  |  | 3,671 |  |  | 4,911 |
Allowance for credit losses on loans | $ | 40,244 |  |  | $ | 17,667 |  |  | $ | 22,577 |
Accounting policies stated in Note 1 reflect the adoption of Topic 326 as it relates to investment securities, loans and off–balance sheet credit exposures as of January 1, 2020. Disclosures related to the accounting guidance prior to the adoption of Topic 326 can be found in Form 10–K for the year ended December 31, 2019.

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